Windows: If you're a fan of widgets and other desktop embedded sources of information, Feedling can park RSS feeds on your desktop in a transparent overlay.

Feedling isn't a feature rich RSS reader but it does what it sets out to do, put RSS feeds on your desktop. Our screenshot here shows a single RSS feed, but you can stack multiple feeds together to turn an entire desktop into a feed reader. You can configure the font, font size, and text color independently for each feed, a convenient way to make your more important feeds stand out.

Feedling is freeware, Windows only, and requires .NET 3.5+. Have a favorite widget, RSS centered or otherwise? Let's hear about it in the comments.